Can-body blank



Patented Sept. 13, 1927 UNITED STATES PATENT OFFICE.

FRANKLIN RUDOLPH, OF CHICAGO, ILLINOIS, ASSIGNOR '10 AMERICAN CAN COKPLNY,

01' NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

can-sonar BLANK.

Application filed September 1, 1922. Serial No 585,802.

Mg invention relates to an improvement m t e formation of blanks for can bodies and has for a rincipal object the provision of a blank whlch, when formed into a can 5 body and the latter flanged in the usual manner preparatory to the double seaming of an end thereto, will present a line defining the overlappin flange which will not 1' ely to sever or damage the gasket which is forced upon said flange in the rocess of double seaming. The customary orm of blank is such that when the ends thereof are joined in a side seam with the top and bottom edges merely overlapped and flanged, a stralght line, radial to the center of the can body, defining the overlapping edge across the flange results, in which case the (gasket (when applied on to the can bc y flange) is cut straight across by said end line of the flange.

With this construction, it has been a freguent experience to have the gasket, which is in the fl of the cover, severe b this straight hne ed and it is obvious at the effectiveness 0 the gasket is thus impaired. p In accordance with m -111V8Ilt1011, the blank is cut e(s10 that:11 the 3e defining this over apping e is 'agon or at an ang e to the axis of the flan a nd is thus arranged phartiall m t ecircumferential form of t 0 et whereby damage to said gasket, whic results from the straight overlappin line, is, in large measure, ehminated, an the gasket ispermited to pack in about the blank edge in the flange.

It is also an object of the invention to provide, in the manner stated, a body flange which offers less resistance to bending. m

the flan and double p 1 and whlch obtains a finished seam of more even and rfect character. Y

Other dia ects and advantages of the invention wi be apparent as it is understood from the following description,

which, taken in connection with the accoman drawings discloses a preferred embodidi reo ent the iteferrinlg to the drawings,f bod lgure' \isa rspectiveo am y formed from a Edd blank, in which my invention 1s embodi prior to the flanging of the ends thereof;

-Fig.2isaplanviewofablank;

edge in the body Fig. 3 is a detail perspec ive, showing the body end flange? and applied thereto by the usual double seaming process. The arrangement for this urpose, contemplates interlocking of the gas '12 and 13 to form a locked side seam 14 extendin throughout the major part of the height 0 the body. Near the top and bottom edges, the blank is notched at one end at 15 and 16 and cut away at the opposite end at 17 and 18 so that the ed e parts 12 and 13 may be flanged and fol ed into interlocking engagement, leaving and portions 19 and 21 WlllCh merely overlap the op sed pgrtions of the opposite end of the b ank,

mg secured thereto, in accordance with the usual method, by solder'which is applied to the finished seam.

Y The purpose of this arrangement is .to

permit the to and bottom of the can body to be flange outwardly, as indicated in Fig. 3, it being understood that the can ends are provided with flanges adapted to be interfolded with the flange 22 for closing the container by a double seaming process. invention, the I In accordance with my corners ofthe blank are out ofl at 23 and 24, so that when the parts 19and 21 are overla ped, as indicated in Fig. 1, and the end 0 'the body flanged, as shown in Fig. 3, the line formed by the cut24 will be at an angle to the axis of the flange, as illustrated. The opposite corners 25 and 26 are also cut away, to prevent their pro'ecting on the under side of the flange. The agonal line betweemsaid overlapping edges thus extends partial] about the circumferentlal gasket and t e latter is less likely to be severed in the process of a plication, as would result from a straight line across the flange coincident with the axis thereof.

Furthermore, this formation of the blank ,provides less metal in the flange at the joint than in the type of blank previously emloyed, and thus ofiers less resistance to I It is thought that the invention and many of its atten ant advantages will be understood from the foregoing description, and

it will be apparent that various changesr sacrificing all of its material advantages,

lya I the form hereinbefore described being merereierred embodiment thereof. c aim:

1. A can body blank, comprising a piece of sheet metal notched in its side edges ad- 'acent the top and bottom to provide interlockin side flanges throughout the major part 0 the height of the blank and overlapping ed es at the top and bottom, the material o the blank at the corner which is disposed inside of the can being cut ofl diagonally whereby when the can body is flanged outwardly at its ends the overlapping corner edge extends diagonally across above the underlapped flange to prevent severing of a gasket placed thereon when a cover is applied to the can. 7

2. A can body blank, comprising a piece of sheet metal notched at its corners to permit formation of a' can body having an interlocked side seam throug out the major part of its vertical height and having top and bottom edges which are merely overlapped and not locked, the corners of both the overlapping and the underlappin edges being cut off at an angle whereby w en thP end ofthe body is flan ed outwardly a reduced amount of meta is present in the flange andless resistance oflered to the bending. thereof.

'3. A can body blank, comprising a sheet of tin plate adapted to be joined at its edges to form a can body with the top and bottom edges in merely overlapping relationship, a corner of the underlapping edge of said blank being cut off diagonally whereby when an end of the formed body is flanged outwardly a diagonal line defining the overlaping edge is presented to the gasket which is orced upon the flange in the process of applying a cover.

applied.

FRANKLIN RUDOLPH. 

